 The Rotor is an amusement park ride first demonstrated in 1949 but has been surpassed by an amusement ride designed and manufactured by who?  
Wisdom Industries
-1
Section::::Abstract.
Rotor (ride)
4451914
-1
Section::::Abstract.
Rotor (ride)
4451914
-1
Section::::Abstract.
Rotor (ride)
4451914
-1
Section::::Abstract.
Gravitron
2093184
-1
Section::::Abstract.
Gravitron
2093184